Rotating device for percussive tools



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LEWIS C. BAYLES, OF EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND COMPANY, OF' JERSEY CITY, NEW JERSEY, A CORPORATION 0F NEW JERSEY.

ROTATING- DEVICE FOR PEBCUSSIVE TOOLS.

Specification of Letters Patent.

Patented Apr. 19, 192i.

Application iled March 22, 1920. Serial No. 367,835.

To all whom t may concern:

Be it known that I, Lnwls C'. BAYLES, a citizen of the United States, residing at Easton, in the county of Northampton and State of Pennsylvania, have invented a cer tain new and useful Improvement in Rotating Devices for Percussive Tools, of which the following is a specication.

rI`his invention relates to liuid actuated percussive tools, but more particularly to rotating devices and connections for imparting rotation to the drill steel.

The objects of the invention are to simplify and reduce the number of parts in the train of operative connections required to transmit rotative motion from a motor or source of power to the drill steel, and avoid as far as possible counter shafts and gearing external to the piston chambers of the tool.

Another object of the invention is to utilize an anvil block as one of the rotating elements for transmitting rotation to the drill steel.

To these ends and in order to carry out further objects of the invention which will hereinafter appear, the invention consists of the combinations of elements shown in one of their preferred forms in the accompanying drawings in which- Figure l is a side view partly broken away and partly in longitudinal section of so much of a drill casing and front head as will ,serve to show the invention,

Fig. 2 is a transverse sectional view on the line 2 2 of Fig. l, and

Fig. 3 is a transverse sectional view on the line 3-3 of Fig. 1.

Referring to the drawings, A represents the cylinder casing of a percussive tool, in this instance a rock drill, and B represents the striking end of the piston hammer adapted to reciprocate in the cylinder and preferably fluid actuated although the means for supplying and distributingthe motive fluid under pressure are not shown as forming no part of the present invention. The front head C of the tool is suitably secured to the cylinder casing A by the usual side bolts D and the drill steel F is held in the rotating chuck G within the front head. f

Between the front head and drill cylinder casing an anvil block seat H is prefer.- ably secured, and an anvil block J lies with'n in the chuck Gr and is guided in the seat H. The anvil block J has slidable and non-rotativel engagement with the chuck Gr and in this instance and as a convenient construction the anvil block is provided with flutes or ribs K engaging internal grooves L in the chuck G.

A rotating shaft O passes through the piston B and slidably but non-rotatably engages the anvil block J, in this instance, the shaft O having flutes P at its inner end engaging internal ribs or fiutes Q in the anvil block luso that rotation of the shaft O im parts rotation to the anvil block J, the chuck G and the vdrill steel F. The usual water tube R passes through the parts as shown for conducting cleaning fluid to the drill steel.

The construction is simple and etiicient, easy to construct and assemble and not liable to @et out of order.

ny suitable rotation motor (not shown) may be provided for driving the rotating shaft 0, and in accordance with my construction, the motor may be located in any convenientposition on the tool, as for instance at the back end, which is a desirable location in the majority of instances, particularly in stope drills. Furthermore, the outside of the drill casing and front head is kept smooth and external protuberances and bearings for driving connections are avoided I claim: Y

l. In a percussive tool, the combination of a cylinder casing, a piston reciprocating therein, an anvil block adapted to receive the impact of the piston, a chuck for receiving the drill steel, 'the chuck and anvil block having sliding but non-rotating engagement. and a rotating shaft passing through the piston and slidably but non-rotatably en gaging the anvil block for imparting rota tion to the drill steel.

2. In a percussive tool, the combination of a cylinder casing, a piston reciprocating therein, an anvil block adapted to receive the impact of the piston, a chuck for receiving'the drill steel, the anvil block slidably engaging the chuck but rotatable therewith, and a rotating shaft passing through the piston and having a fluted end engaging iiutes on the anvil block, whereby rotation is imparted tothe drill Steel.

3. In a peroussivetool, the combination of a cylinder` casing, a piston reciprocating therein7 an anvil block adapted to receive the `impact of the piston, a chuck for re- 5 ceiving the olrill steel, theanvil block slidably `engaging the chuck but rotatable therewith, an anvil block seat, and a rotating shaft passing through the piston and having afiuted end Centrally engaging htes on the anvil blook,.whereby rotation is im- 10 parted to the drill steel.

In testimony whereof, I have hereunto set my hand.

LEWIS C. BAYLES. 

